" from a 12V battery that is floated by a small linear supply. (A year or
so ago, I went through my home and got rid of all the switch-mode crap).
At last count, I have more than a dozen linear supply replacements here. Some are built into consumer A/V equipment, others are used to power routers, Ethernet switches, cell phones, etc. I like the PowerOne, Condor, and International Power branded open frame "OEM" supplies. I grab extras any time they come available on the surplus market - and often for well under new prices from Mouser and Newark.
Tackling EMI is always a maddening exercise here. If there's the slightest noise bump on a panadapter display, I can't rest until it's gone. Just this morning, I replaced what I thought was a quiet Toshiba laptop supply. It was being used to power a low-power SDR transceiver. All was fine until I ventured down to the middle of the AMBC band this morning. The grunge level increased over 30 dB when compared to 160m.
Paul, W9AC _________________ Topband Reflector Archives - http://www.contesting.com/_topband
